diff options
| author | Huang Shijie <b32955@freescale.com> | 2014-02-24 18:37:37 +0800 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-04-14 11:22:58 -0700 |
| commit | b199489d37b21c5e294f95bf265acc5dde3fc3a2 (patch) | |
| tree | a498f39ae5035cdb9091eb96d95662db3fc54a82 /include/linux/mtd | |
| parent | 6e602ef73334550bbbb8be1041a3ce6eecbd42f1 (diff) | |
| download | lwn-b199489d37b21c5e294f95bf265acc5dde3fc3a2.tar.gz lwn-b199489d37b21c5e294f95bf265acc5dde3fc3a2.zip | |
mtd: spi-nor: add the framework for SPI NOR
This patch cloned most of the m25p80.c. In theory, it adds a new spi-nor layer.
Before this patch, the layer is like:
MTD
------------------------
m25p80
------------------------
spi bus driver
------------------------
SPI NOR chip
After this patch, the layer is like:
MTD
------------------------
spi-nor
------------------------
m25p80
------------------------
spi bus driver
------------------------
SPI NOR chip
With the spi-nor controller driver(Freescale Quadspi), it looks like:
MTD
------------------------
spi-nor
------------------------
fsl-quadspi
------------------------
SPI NOR chip
New APIs:
spi_nor_scan: used to scan a spi-nor flash.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>
[Brian: rebased to include additional m25p_ids[] entry]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'include/linux/mtd')
| -rw-r--r-- | include/linux/mtd/spi-nor.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h index 3a3c3872c8cd..16d8409abcdc 100644 --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -162,4 +162,24 @@ struct spi_nor { void *priv; }; + +/** + * spi_nor_scan() - scan the SPI NOR + * @nor: the spi_nor structure + * @id: the spi_device_id provided by the driver + * @mode: the read mode supported by the driver + * + * The drivers can use this fuction to scan the SPI NOR. + * In the scanning, it will try to get all the necessary information to + * fill the mtd_info{} and the spi_nor{}. + * + * The board may assigns a spi_device_id with @id which be used to compared with + * the spi_device_id detected by the scanning. + * + * Return: 0 for success, others for failure. + */ +int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id, + enum read_mode mode); +extern const struct spi_device_id spi_nor_ids[]; + #endif |